This lead is used as an all-in-one-type lead with a neck loop, a bead to slide down to tighten around the neck, and a swivel so the lead will not twist up if the dog turns.
The martingale is a more secure type lead, particularly for puppies who might try to back out of the lead. The strap will match the cord color. The martingale strap is about 8" long.  If you want any special beading, certain colors, flowers, patterns for examples, specify in the special instructions box.
I do have colored crystals, they do not catch light as much as the clear, which I normally use.  If you want colored crystals instead of clear, ask me first if I have that color in stock before you order.